e2e: Only create PSP if RBAC is enabled

Using PSP in e2e tests depend on RBAC being enabled in the cluster and
thus PSP should only be used when RBAC is.

test/e2e/framework/psp_util.go

@@ -97,7 +97,7 @@ var (
 )
 
 func CreatePrivilegedPSPBinding(f *Framework, namespace string) {
-	if !IsPodSecurityPolicyEnabled(f) {
+	if !IsPodSecurityPolicyEnabled(f) || !IsRBACEnabled(f) {
 		return
 	}
 	// Create the privileged PSP & role